uopz_undefine

(PECL uopz 1, PECL uopz 2, PECL uopz 5, PECL uopz 6)

uopz_undefine — Undefine a constant

说锟斤拷

uopz_undefine ( string $constant ) : bool
uopz_undefine ( string $class , string $constant ) : bool

Removes the constant at runtime

锟斤拷锟斤拷

class

The name of the class containing constant

constant

The name of an existing constant

锟斤拷锟斤拷值

锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷

锟斤拷锟斤拷

Example #1 uopz_undefine() example

<?php
define("MY", true);

uopz_undefine("MY");

var_dump(defined("MY"));
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

bool(false)